Unfortunately there is no exact replacement date other than the game should hopefully drop any time between April 1st, 2021 and March 31st, 2022.
The reason behind this delay is due to the whole COVID pandemic and the difficulty it has brought many companies this year, a full message regarding the actual delay from the developers can be seen below..
Benefitting from this strong momentum and despite having moved Far Cry 6 and Rainbow Six Quarantine to 2021-22 to leverage their full potential in the context of production challenges caused by COVID-19, our new non-IFRS operating income targets for 2020-21 remain within the boundaries we set back in May. Being able to maximize the long term value of our IPs while at
the same time maintaining solid financial targets highlights the increasing recurring nature of our revenues, the strength of our portfolio of franchises, confidence in our holiday season release slate and current supportive industry dynamics.
SOURCE: Financial Report